Should we replace the XMLHttpRequest by the Fetch API?

[camelaissani]

Currently, requests are sent through the XMLHttpRequest object.
Simplify and make the code more standard by using Fetch API.

[camelaissani]

It will break the compatibility because home made request and response objects will be replaced by the standard request and response.

[camelaissani]

Request Response and Fetch API are not supported on all browsers.
Some mobile browsers and Safari are not compatible.